Yellowstone hazes its habituated wolves, and it works
From the Jackson Hole News & Guide in Wyoming:
Colleen Marzluff whistled to her ornithologist husband, John, as he was looking for a raven nest in a string of trees on the low southern flank of Yellowstone’s Bison Peak.
Since Colleen had taken on the “sentinel” role, John knew that something furry and large was probably entering the area.
